Chemistry Homework Help: Answers & Questions Page 82

• 5. Lithium nitride has the chemical formula ##Li_3N##. Rubidium is in the same chemical family as lithium. What is the formula of rubidium nitride?

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• How many atoms are there in 1 mole of H2O, and how would you calculate this?

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• How does a hydrolysis reaction separate a polymer into its monomers?

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• What is activation energy in a chemical reaction and what happens when we provide activation energy to a chemical?I know it's going to react.But I need to know the full procedure.And why activation energy is different from bond energy?

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• What type of reaction is this? How do you balance it? ##Hg(OH)_2 + H_3PO_4 -> Hg(PO_4)_2 + H_2O##

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• Is sulfur a metal, metalloid, or nonmetal? What is its family name?

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• What side products are formed in the aldol condensation of dibenzalacetone?

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• What is the noble gas configuration for oxygen?

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• How can I find valence electrons of transition metals?

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• What is the bond polarity of CH3CL?

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• How can I determine molecular geometry from the Lewis structure?

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• I am a member of the boron family and am the most abundant metal in the Earth's crust. What am I?

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• What is the mass of ##NaCl## required to prepare 0.5 liters of a 2.5 molar solution of ##NaCl##?

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• What is the structure of the acetal formed by reaction of ethanol with acetophenone?

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• What is the electron configuration of Li+?

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• How can nucleophilic addition of a primary amine give an imine ?

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• How many carbon atoms are in 10g of CH4 and 20g of C3H8?

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• Mg metal reacts with HCI to produce hydrogen gas. Mg (s) + 2HCl (aq) ---> MgCl2 (aq) + H2 (g) What volume,in liters, of H2 at STP is released when 8.25g of Mg reacts?

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• What percent of calcium carbonate is oxygen?

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• When dilute aqueous solution of iron (III) nitrate and sodium hydroxide are mixed, a precipitate is observed. write a molecular, complete ionic, and net ionic equation for the reaction?

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• How would you write the molecular formula for dinitrogen trioxide and nitrogen monoxide?

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• Why do amines generally have lower boiling points than alcohols of comparable molar mass?

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• What is pH when ##[H^+] = 8.43 * 10^-4## ##M##?

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• How can physical properties be used to identify substances?

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• What is absorption spectrum and emission spectrum? Give examples if you can!

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• Could you help me find a metric conversion chart that would help me in chemistry?

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• Calculate the heat energy released when 20.1 g of liquid mercury at 25.00 °C is converted to (s) mercury at its melting point? Constants for mercury at 1 atm: heat capacity of Hg(l)=28.0 J(mol*K), melting point=234.32 K, enthalpy of fusion=2.29 KJ/mol

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• Why are halogens reactive?

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• Why does water have polar covalent bonds?

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• The temperature of a piece of copper with a mass of 95.4 g increases from 25°C to 48°C when the metal absorbs 849 J of heat. What is the specific heat of copper?

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• Is CO2 an empirical formula, a molecular formula, or both?

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• What are some examples of mass number?

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• A solution contains the ions Ag+, Pb2+, and Ni2+. Dilute solutions of NaCl, Na2SO4, and Na2S are available to separate the positive ions from each other. In order to effect separation, the solutions should be added in which order?

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• What is a double replacement precipitation reaction?

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• What is Helium?

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• What is the difference between hydrostatic pressure and atmospheric pressure?

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• Trimethylamine, (CH3)3N, is a weak base (Kb = 6.4 × 10–5) that hydrolyzes by the following equilibrium: (CH3)3N + H2O → (CH3)3NH+ + OH– What is the pH of a 0.1 M solution of (CH3)3NH+? (Enter pH to 2 decimal places; hundredth's.

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• How would you arrange the following elements in order of increasing ionization energy: Te, Pb, Cl, S, Sn?

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• Why is He2 not formed according to Valence Bond Theory? Also please explain Valence Bond Theory.

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• Why does phosphorus come after silicon on the periodic table?

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• What is the formula of the compound formed when Mg reacts with P?

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• What is the atomic number for the silver?

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• What is an alkoxide?

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• A mass of 5kg of ammonia at its boiling point is vaporized when 6.5 MJ of heat is supplied to it. Calculate the specific latent heat of vaporization of ammonia?

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• Could you explain me the Rutherford alpha particle scattering experiment?

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• How can I determine the empirical formula from percent composition?

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• How many double covalent bonds are in an alkane?

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• On adding 'x' g of the solute to 100 g aqueous solution, the concentration in terms of mass by mass percentage changes from 50% to 60%. What is the value of 'x'?

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• How do intermolecular forces affect freezing point?

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• How do you calculate percent composition using gas chromatography?

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